In the meanwhile, the surveyors carried the line three miles, which was no contemptible day's work, considering how cruelly they were entangled with briers and gallbushes.
adverb
During the time that something is happening, often specifically in a different place.
There was a party going on downstairs. Meanwhile, I was reading a book.
During an intervening time; from now until a future time.
We’re going on holiday next month; meanwhile, keep working on the project.
In contrast to aspects previously mentioned.
Some songs on the album are beautiful. Meanwhile, others are quite forgettable.